Olympiad Test: Getting to Know Plants - Class 6 MCQ

In desert plants like cactus, the green fleshy stem makes and stores food.

Seeds of coconut are spongy or have a fibrous coating, which helps them to float on water.

- The coconut seed is adapted for water dispersal, and its ability to float is mainly due to the outermost fibrous cover.
- This fibrous husk, also known as the mesocarp, has a spongy texture filled with air spaces, making it buoyant.
- This buoyancy allows coconuts to float on water currents, facilitating their dispersal to distant locations.
- The structure is essential for the survival and germination of the coconut seed in new environments, aiding in its propagation.

Seed dispersal is scattering of seed, germination is growth of a seed,seed leaves are a part of a seed, and manure is dead and decaying matter that increases the fertility of soil.

• The experiment shows that the stem conducts water to all parts of the plant, as evidenced by the petals turning different colors.
• The stem has localized structures for water conduction, as the colors remain separated, indicating that water travels through specific pathways.
• The stem conducts solutes along with water, as the dyes (solutes) are transported with the water to the petals.
• Thus, the correct answer is D: All of these.

Hari would get the best harvest as he has ploughed his fields, added manure, sowed seeds, and irrigated them. He sprayed pesticides too.

Wheat and Gram are rabi crops while Bajra and Maize are kharif crops

Cocklebur is incorrectly placed in group III and should be replaced with Litchi.

- Hydrophytes are plants adapted to live in aquatic environments.
- True Statement: A - They are aquatic; the root system is less developed.
- Their root systems are underdeveloped because they absorb water and nutrients directly through their tissues.
- These plants have adaptations like air-filled spaces to aid buoyancy and facilitate gas exchange.
- Options B and C are incorrect because hydrophytes specifically thrive in aquatic settings, not necessarily in shadows or marshy areas.‘Support and immobilization is the first aid treatment at the time of fractured of bones.

The given figure is that of a Bryophyllum leaf. It reproduces from leaf buds that are developed on the margin of it. The process by which new plants are grown from the parts of the plant other than seed is called vegetative propagation.

Flower changes into fruits and fruit bears seeds. Seeds give rise to new plants when sown into soil.

In the figure, W is flower, Z is leaf, X is stem and Y is root. In cucumber plant, the edible part is its fruit, not root.